[jdk17u-dev] RFR: 8313676: Amend TestLoadIndexedMismatch test to target intrinsic directly

[Aleksey Shipilev]

Clean backport to make the test sensitive to original regression.

Additional testing:
 - [x] macos-aarch64-server-fastdebug; test passes out of box; starts to fail when JDK-8313402 is reverted (sensitivity check)

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Commit messages:
 - Backport 4b192a8dc37297f0746c0c68322e0168d9f47771

Changes: https://git.openjdk.org/jdk17u-dev/pull/1667/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1667&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8313676
  Stats: 7 lines in 2 files changed: 5 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1667.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1667/head:pull/1667

PR: https://git.openjdk.org/jdk17u-dev/pull/1667